<template>
  <li>
    <label>
      <input  type="checkbox" :checked="item.done" @change="checkedTodo(item.id,!item.done)" />
      <span>{{item.title | sub(30) | atguigu("vue") }}</span>
    </label>
    <button class="btn btn-danger" @click="delTodo(item.id)" >删除</button>
  </li>
</template>

<script>
export default {
  name: "TodoItem",
  props:{
    item:{
      type:Object,
      required:true
    },
    delTodo:{
      type:Function,
      required:true
    },
    checkedTodo:{
      type:Function,
      required:true
    },
    
  },
  computed:{
    //计算item 数据
    todoItem(){
      return this.item.title.length > 10 ? this.item.title.slice(0,10)+"..." : this.item.title
    }
  }
 
 
};
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li:hover button{
  display: inline-block;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}


.btn {
  
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

</style>